Flavor is more likely to work means that if the user uses a move unconventionally, you as the ref should accept the use as long as it makes any sense at all. For example, Trainer Y tells his Snivy to use Leaf Tornado to block an icy wind. Normally, this would fail, but if the pokemon is cool, it does work somewhat, because it makes a little sense. That said, using tackle to stop surf would never work. This is largely up to your discretion.
Here are my mons!

Yum! The Lickitung(Move your mouse to reveal the content)Yum! The Lickitung (open)Yum! The Lickitung (close)

Lickytung(*) Yum! (M)Nature: Quiet (Special Attack increased by *; A 15% decrease in Base Speed [Rounded Up] and a +5% flat increase in accuracy (e.g. 85 Accuracy becomes 90) on an opponent's attacks.)Normal: Normal STAB; adapt comfortably to any surrounding after 3 actions. Able to use Outrage without losing focus.Abilities:Oblivious: (Innate) This Pokemon is incapable of being affected by Attract or Cute Charm.Own Tempo: (Innate) This Pokemon moves at its own pace and when confused, it will never harm itself in confusion. If the Pokemon also has Tangled Feet, it will raise Accuracy by one (1) Stage.Cloud Nine: (Can Be Activated) This Pokemon dispels a misty aura which rises into the sky and nullifies any weather effect when it is orderedStats:
HP: 90
Atk: Rank 2
Def: Rank 3
SpA: Rank 3 (+)
SpD: Rank 3
Spe: 26

Sap Sipper: Type: Innate This Pokemon lives on a steady diet of plants and has developed defenses to every Grass-type attack. When attacked with a Grass-type move, damage and effects are negated and the Pokemon gains a one (1) stage attack boost. A boost gained this way by an opponent's attack will be maintained at the end of each round. Self-targeted attacks do not maintain boosts.

Serene Grace: (locked)Type: Innate This Pokemon has a blessing which doubles the success chance of its attack’s secondary effects. (eg paralysis from Thunderbolt)

Type: WaterWater: Water STAB; Can breathe and have excellent mobility when underwater, are less capable on land unless they are entirely amphibious.

Abilities:Swift Swim: The Pokemon with this ability moves extremely fast is slick, rainy conditions, doubling (x2) its speed in the rain.Rattled (DW): These Pokemon are more easily frightened by Ghost, Bug, and Dark-typed attacks and will raise their speed by one (1) stage when struck by attacks of those types.

Abilities:Compoundeyes: (Innate) This Pokemon’s complex eyes give it a comprehensive view of the field, making its attack 30% (x1.3) more accurate.Run Away (DW): (Innate) This Pokemon is quick on its feet and will evade any field traps and hazards that would harm it (Spikes, Stealth Rock, Toxic Spikes) in an arena. A Pokemon can still absorb Toxic Spikes if it has Run Away and is Poison-typed. Run Away does not allow the Pokemon to switch out of trapping moves or abilities, however it can escape other situational trapping strategies in battle.

Nincada: Hone Claws, X-Scissor Deerling, Metal Claw Deerling
-If Deerling uses Camoflauge in some sort of evasive manor that would last for more than one action, use mind reader while it uses Camoflauge to lock onto it

Also, I'm going to assume that, since you did not put a target for Mud-Slap, that it would just block out the sun, giving both of Yarnus' pokes a -1 Acc drop, as well as nerfing Synthesis (just because there's no sun doesn't mean it won't work) but no damage would be done. Sound good?

will you let me go? BISMILLAH! NOOOOO! WE WILL NOT LET YOU GO! In fact, we will throw Ice Beams and Solarbeams at you, Gaia, dealing absolutely massive damage! What will you do in response? Why, its a combination that would never work in a thousand years, but somehow does here because that Nincada is just SO. FUCKING. COOL. Kicking air with the creation of the clones? Amazing!

As Gaia has to recover from that exhausting combo, Yum makes a giant wave that comes crashing over Gaia, even through the blindness! It looks like Gaia will take a lot of damage from that... or not! It appears that all 3 of the Gaias hit were clones, and they just poofed away! Meanwhile, Aww tries to regain health from Synthesis, but all that dirt in the sky makes it hard for her, and she barely recovers anything!

Due to a mistype, Yum protects himself from an attack that's not even aimed at him while Aww just sits and regains some energy! Looks like Gaia's going to get off a free X-Scissor for some massive damage!

Will Gaia be able to stall out Yarnus' team, or will the two Normal-types crush the Bug-type under their combined feet?

As we begin what may just be our final round, Aww jumps straight into the air and stays up there while Yum spits out a pillar of fire, incinerating Gaia... 's clone! As the real Gaia lunges at the airborne Aww, he misses with his X-Scissor, only to get kicked in the face!

Apparently worrying about her HP, Aww gathers the power of the sun to revitalize her again, but it still doesn't recover much due to all of the dust in the air! Yum then spits out another beam, but this time, its a pillar of ice, nearly KO'ing Gaia! In response, Gaia picks up his arms again as scissors, and slashes at Aww once again, dealing massive damage as always!

As Aww jumps into the air for a second time, Yum fires off a mighty Flamethrower... and Gaia falls down! He can't take any more! He fainted!